Cryosphere carbon dynamics control early Toarcian global warming and sea level evolution

@article{Ruebsam2019CryosphereCD,
  title={Cryosphere carbon dynamics control early Toarcian global warming and sea level evolution},
  author={Wolfgang Ruebsam and Bernhard Mayer and Lorenz Schwark},
  journal={Global and Planetary Change},
  year={2019}
}
Impact of a northern-hemispherical cryosphere on late Pliensbachian–early Toarcian climate and environment evolution
Abstract The historical view of an equable Jurassic greenhouse world has been challenged by recent studies documenting recurrent alternation between contrasting climate modes. Cooling of
δ13C of terrestrial vegetation records Toarcian CO2 and climate gradients
TLDR
Stable carbon isotopes (δ13C) of molecular land plant fossils complemented by bulk organic and inorganic carbon fractions for early Toarcian (Early Jurassic) sediments that coincided with global warming and a carbon cycle perturbation are reported.
Direct coupling between carbon release and weathering during the Toarcian oceanic anoxic event
Silicate weathering represents a major feedback mechanism in the Earth’s climate system, helping to stabilize atmospheric CO2 levels and temperature on million-year time scales. On shorter time
Rapid light carbon releases and increased aridity linked to Karoo–Ferrar magmatism during the early Toarcian oceanic anoxic event
Large-scale release of isotopically light carbon is responsible for the carbon isotope excursion (CIE) of the Toarcian Oceanic Anoxic Event during the Lower Jurassic. Proposed sources include methane
Evidence for local carbon‐cycle perturbations superimposed on the Toarcian carbon isotope excursion
TLDR
Connecting new carbon and oxygen isotope data with documentary lipid biomarkers shows that the global carbon cycle during the Toarcian OAE was disturbed by enhanced green sulfur bacteria (GSB) metabolisms and early diagenesis at local scales.
Assessing the importance of thermogenic degassing from the Karoo Large Igneous Province (LIP) in driving Toarcian carbon cycle perturbations
TLDR
The effects of pulsed carbon release from the Karoo LIP on atmospheric pCO2 and δ13C of marine sediments are explored, using the GEOCLIM carbon cycle model and it is shown that a total of 20,500 Gt C replicates the Toarcian pCO 2 and ε13C proxy data, and that thermogenic carbon represents a plausible source for the observed negative CIEs.
The Toarcian Oceanic Anoxic Event: where do we stand?
Abstract The study of past climate changes is pivotal for understanding the complex biogeochemical interactions through time between the geosphere, atmosphere, hydrosphere and biosphere, which are
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